Experiment you need: chromatography paper pencil 250 cm3 beaker glass rod / pencil different coloured inks method 1. make a horizontal pencil line about 1 cm from the bottom of a rectangular piece of chromatography paper 2. place up to 4 small ink spots on the line at equal distances apart. 3. Carfully sellotape the opposite end of the paper to a glass rod or pencil 4. suspend the paper so the bottom edge is just touching the water in the bottom of a large beaker but the pencil line and ink spots are above the water's surface 5. allow to develop and remove from the water when the water is within 1 cm of the rod/pencil 6. leave to dry.
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